<template>
	<view>
		<!-- 使用自定义搜索组件 -->
		<my-search @click="gotoSearch" :bgcolor="'#343434'" :radius="18"></my-search>
		
		
		<view class="scroll-view-container">
			<!-- 左边滑动 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
				<block v-for="(item,i) in cateList" :key="i">
					<view @click="activeChanged(i)" :class="['left-scroll-view-item',i===active ?'active':'']">{{item.cat_name}}</view>
				</block>
				
			</scroll-view>
			<!-- 右边滑动 -->
			<scroll-view :scroll-top="scrollTop" scroll-y="true" :style="{height: wh + 'px'}">
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!-- 二级分类标题 -->
					<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					<!-- 二级分类下的三级分类列表  -->
					<view class="cate-lv3-list">
						<view @click="gotoGoodsList(item3)" class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3">
							<!-- 三级分类图片 -->
							<image :src="item3.cat_icon"></image>
							<!-- 三级分类文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import badgeMix from '../../mixins/tabbar-badge.js'
	
	export default {
		mixins:[badgeMix],
		data() {
			return {
				//当前设备可以高度
				wh:0,
				//获取数据 //一级分类列表
				cateList:[],
				active:0,
				//二级分类列表
				cateLevel2:[],
				//scroll-view标签是微信小程序滑动标签,里面有一个scrool-top 重置为0自动回到第一行
				scrollTop:0
			};
		},
		onLoad() {//生命周期 页面加载时
			const sysInfo= uni.getSystemInfoSync()
			console.log(sysInfo)
			this.wh=sysInfo.windowHeight - 50
			//获取分类列表的数据
			this.getCateList()
			
		},
		methods:{
			async getCateList(){
				const {data:res} = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !==200) return uni.$showMsg()
				this.cateList =res.message
				//二级分类赋值
				this.cateLevel2=res.message[0].children
			},
			activeChanged(i){
				this.active=i
				//重新为二级分类赋值
				this.cateLevel2=this.cateList[i].children
				this.scrollTop=this.scrollTop === 0 ? 1 : 0
			},
			gotoGoodsList(item3){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid='+item3.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
			
		}
	}
</script>

<style lang="scss">
	.scroll-view-container{
		display: flex;
	}
	.left-scroll-view{
		width: 120px;
		.left-scroll-view-item{
			background-color: #F7F7F7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;
			&.active{
				background-color: #FFFFFF;
				position: relative;
				&::before {
					content:'';
					display: block;
					width: 3px;
					height: 30px;
					background-color: #6799ff;
					position: absolute;
					top: 50%;
					left: 0;
					transform: translateY(-50%);
				}
			}
		}
	}
	.cate-lv2-title{
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px;
	}
	.cate-lv3-list{
		display: flex;
		flex-wrap: wrap;
		
		.cate-lv3-item{
			width: 33.33%;
			display: flex;
			flex-direction: column;
			justify-content: center;
			align-items: center;
			margin-bottom:10px ;
			image{
				width: 60px;
				height: 60px;
			}
			text{
				font-size: 12px;
			}
		}
	}
</style>
